STIGQter: STIG Summary: Red Hat Enterprise Linux 8 Security Technical Implementation Guide Version: 2 Release: 8 Benchmark Date: 01 Jul 2026:

The RHEL 8 SSH daemon must not allow Kerberos authentication, except to fulfill documented and validated mission requirements.

DISA Rule

SV-230291r1069303_rule

Vulnerability Number

V-230291

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

RHEL-08-010521

Severity

CAT II

CCI(s)

CCI-000366 - Implement the security configuration settings.

Weight

Fix Recommendation

Configure the SSH daemon to not allow Kerberos authentication.

Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "no":

KerberosAuthentication no

The SSH daemon must be restarted for the changes to take effect. To restart the SSH daemon, run the following command:

$ sudo systemctl restart sshd.service

Check Contents

Verify the SSH daemon does not allow Kerberos authentication with the following command:

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*kerberosauthentication'

/etc/ssh/sshd_config:KerberosAuthentication no

If the value is returned as "yes", the returned line is commented out, no output is returned, or has not been documented with the information system security officer (ISSO), this is a finding.

If conflicting results are returned, this is a finding.

Vulnerability Number

V-230291

Documentable

False

Rule Version

RHEL-08-010521

Severity Override Guidance

Check Content Reference

Target Key

2921